BT Full Fibre 300: Speed, Price and Who It Suits

BT Full Fibre 300 is a full-fibre (FTTP) broadband package that delivers around 300Mbps download and 49Mbps upload speeds over the Openreach fibre network, on a contract that is usually 24 months. It sits in the middle of BT’s full-fibre range, above the 100 and 150 tiers and below 500 and 900, and suits busy households that stream, video-call and game across several devices at once.

The important thing to understand up front is that the advertised 300Mbps is the speed to your router, not necessarily what a single device sees over Wi-Fi. A phone or laptop three rooms away will often show a lower figure, which is why most homes do not need to jump to 900 to feel a real improvement. what you actually get, what it costs in 2026 including built-in price rises, and how it compares with 150 and 900 so you can pick the right tier.

Free Price Compare checks live broadband availability and deals across UK providers by postcode, so you can see whether Full Fibre is available at your address before you commit.

Last updated: July 2026

Written by the Free Price Compare editorial team | Reviewed July 2026

What speed does BT Full Fibre 300 actually give you?

BT Full Fibre 300 gives an average download speed of around 300Mbps and an average upload speed of around 49Mbps, delivered as a full-fibre (FTTP) connection to your home. Full fibre means the fibre-optic cable runs all the way to your property rather than stopping at a green street cabinet, so the speed is more consistent than older part-fibre (FTTC) connections. The 300Mbps figure is measured to your router; what a single device sees over Wi-Fi depends on your router placement, the number of walls, and how many devices are active at once. For most households, 300Mbps handles several 4K streams, large game downloads and video calls together without noticeable slowdown.

Upload speed matters more than many people expect. The 49Mbps upload on Full Fibre 300 is far higher than the 10Mbps to 20Mbps typical of older fibre-to-the-cabinet lines, which helps with video calls, cloud backups and uploading large files. That symmetry gap is one of the clearest benefits of moving from part-fibre to full fibre.

Full fibre now reaches 82% of UK homes, or 24.9 million premises, according to Ofcom’s Connected Nations update (Spring 2026, data as of January 2026). If you are on an older BT part-fibre plan, moving to Full Fibre 300 is usually a step up in both speed and reliability.

Broadband Deals Reviewed by James Ford, TV and Broadband Expert

Sport TV + Fibre 2 Only

• New customers only
• Offer details subject to change
• Smart Hub 3 Wi-Fi 6 router and Cyber Threat Protect, powered by Norton, included as standard

67Mb average* speed

TV channels

£30.00 Setup costs

24 Month contract

Pay as you goCalls

£44.99per month

Buy Now
or call 0800 977 5741

Offer Ends02/09/2026

Fibre 2 Only

• New customers only
• Smart Hub 3 Wi-Fi 6 router and Cyber Threat Protect, powered by Norton, included as standard

67Mb average* speed

Unlimited Downloads

£30.00 Setup costs

24 Month contract

Pay as you goCalls

£24.99per month

Buy Now
or call 0800 977 5741

Offer Ends02/09/2026

Fibre 2 & phone

• New customers only
• Smart Hub 3 Wi-Fi 6 router and Cyber Threat Protect, powered by Norton, included as standard

67Mb average* speed

Unlimited Downloads

£30.00 Setup costs

24 Month contract

Pay as you goCalls

£29.99per month

Buy Now
or call 0800 977 5741

View All Broadband Deals

Is BT Full Fibre 300 fast enough for my household?

BT Full Fibre 300 is fast enough for the large majority of UK households, including homes with several people streaming in 4K, gaming online and working from home at the same time. As a rough guide, a single 4K stream needs around 25Mbps, a video call around 3Mbps to 5Mbps, and a large game download will use whatever headroom is spare. With 300Mbps to the router, a busy family home rarely runs out of capacity. The most common cause of slow speeds is not the plan but Wi-Fi coverage: distance from the router, thick walls and older devices all reduce the speed a phone or laptop actually reports.

A useful reality check applies to the jump from 300 to 900. On Wi-Fi alone, without hardwiring your main devices, most of the extra speed on a 900Mbps plan is hard to notice for everyday streaming, browsing and calls, because individual devices and Wi-Fi bands become the limit long before the line does. If most of your household connects wirelessly, 300Mbps usually delivers the improvement you are paying for without overspending. If you regularly move very large files or hardwire a games console or PC, higher tiers such as BT Full Fibre 500 or BT Full Fibre 900 start to make more sense.

Check Full Fibre availability at your postcode

How much does BT Full Fibre 300 cost per month in 2026?

BT Full Fibre 300 is currently listed by BT at £44.99 a month from month 13 on a 12-month contract, and BT also offers 24-month Full Fibre 300 deals with prices that vary by promotion. BT’s own fibre page has shown Full Fibre 300 at higher standard monthly rates once the introductory period ends, while shorter deals through retailers often carry lower introductory prices. Because promotions change week to week, the sensible approach is to compare the current live price at your address rather than rely on any single advertised figure.

Two costs are easy to miss. First, some 12-month deals require a compatible line or apply a connection charge of up to around £49.99 if new installation work is needed; 24-month deals more often include free setup. Second, BT says some Full Fibre 300 deals have a compatible line requirement or a £49.99 connection charge if new installation work is needed. Always read the second-year price and the scheduled increase dates before committing.

Figures are indicative and may change.

Will the BT Full Fibre 300 price rise mid-contract?

The BT Full Fibre 300 price will usually rise during the contract, because most current deals include fixed, pre-agreed increases rather than a flat price for the full term. Recent 2026 offers have shown, for example, a promotional monthly price stepping up to a higher fixed amount from a set date, then again a year later. These increases are written into the contract at sign-up, so you agree to them when you order. Under Ofcom’s rules on mid-contract price rises, providers must set out any in-contract increase in clear pounds and pence at the point of sale, so you can see the future price before you commit.

The practical takeaway is to judge a deal on its whole-contract cost, not just the first-year price. Add up the introductory months and the higher months across the full term, then factor in any reward card, to get the true effective monthly cost. A deal with a low headline price but steep later rises can end up costing more than a slightly higher, flatter alternative.

Compare full-fibre tiers side by side

See how 300, 500 and 900 differ on price and speed before you order.

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Is BT Full Fibre 300 worth it over 150, or is 900 overkill?

BT Full Fibre 300 is usually worth choosing over 150 for households with several heavy users, while 900 is often more speed than most homes can use over Wi-Fi. The 150 tier suits smaller homes with light-to-moderate use, such as one or two people streaming and browsing. Full Fibre 300 doubles the download headroom, which helps when four or five devices stream, download and call at the same time, and its higher upload speed benefits anyone regularly on video calls or backing up to the cloud.

Choosing between 300 and 900 comes down to how you connect. If your devices are mostly wireless, 300Mbps typically delivers the everyday experience you want, and the extra 600Mbps on a 900 plan is hard to feel because Wi-Fi and individual devices cap the real-world speed first. Consider 900 mainly if you hardwire a gaming PC or console, move very large files often, or run a home that hits peak demand across many wired devices. For a lighter-use step down, BT Full Fibre 100 or BT Fibre 2 may be enough, and comparing the full range at your address avoids paying for speed you will not use.

See BT Full Fibre 900 speeds and prices

Do you need a landline or phone line with BT Full Fibre 300?

You do not need a separate landline or phone line rental with BT Full Fibre 300, because full fibre is a broadband-only service that runs over a dedicated fibre-optic line rather than the old copper phone network. There is no line rental bundled into the broadband price, and you are not required to take a phone service. If you want a home phone, calls are an optional add-on that works over the fibre connection, and you can choose to add them or not.

This is a change many long-standing customers notice when moving from an older part-fibre plan that relied on a copper line. With full fibre, the copper phone element is retired, so the connection to your home is fibre end to end. If you currently rely on a traditional landline for calls, check how the digital phone add-on works before switching so any handsets and services you depend on are set up correctly.

Is BT Full Fibre 300 available in my area?

BT Full Fibre 300 is available only where Openreach full-fibre (FTTP) has been built to your property, and coverage is now wide but not universal. Full fibre reaches 82% of UK homes, or 24.9 million premises, and gigabit-capable broadband reaches 89% of UK residential premises, according to Ofcom’s Connected Nations update (Spring 2026, data as of January 2026). Availability can vary street by street, so two nearby homes may not both be able to order it yet.

The only reliable way to confirm availability is a postcode and address check, because BT Full Fibre 300 is delivered over Openreach’s full-fibre network and rollout is ongoing. If full fibre has not reached your address, you may still be able to get an older fibre-to-the-cabinet plan in the meantime, and it is worth re-checking periodically as Openreach continues to build. Comparing by postcode also shows every provider available on that line, not just one, so you can weigh price and speed together.

What is installation and setup like for BT Full Fibre 300?

BT Full Fibre 300 installation usually involves an Openreach engineer visit to fit a small fibre box (an optical network terminal, or ONT) to a wall inside your home, then connect your BT Smart Hub to it. If full fibre has never been installed at your property, the appointment tends to take a couple of hours and someone over 18 must be home. Where a compatible full-fibre line already exists, activation can be quicker and sometimes needs no engineer visit at all.

Setup costs vary by deal. Many 24-month offers include free installation, while some shorter deals can apply a connection charge if new line work is required. Once live, the BT Smart Hub broadcasts your Wi-Fi, and BT Virus Protect is commonly included on Full Fibre 300 plans. If Wi-Fi does not reach every room, a whole-home Wi-Fi add-on can extend coverage, though good router placement solves many coverage issues without extra hardware.

Compare BT and other full-fibre providers

Can you add TV or sport to BT Full Fibre 300?

You can add TV and sport to a BT Full Fibre 300 broadband plan, as the broadband and entertainment services are sold separately and combined at checkout. BT’s TV offering runs over the same fibre connection using a set-top box, and sport packages can be added on top. Because these are optional extras, you can take Full Fibre 300 as broadband only and add or drop TV and sport later depending on what you watch.

Adding TV or sport increases the monthly cost, so it pays to separate the two decisions: first pick the broadband speed that matches your household, then decide whether bundling entertainment is better value than a standalone streaming service. If you mainly stream on apps you already pay for, broadband-only Full Fibre 300 may be the more economical choice, and you can compare it against options like BT Fibre 1 or TalkTalk Full Fibre 150 before deciding.

• TalkTalk Fibre 35: Affordable Broadband for Small Homes
• BT Full Fibre 900: Fast Broadband for Homes & Businesses
• TalkTalk Full Fibre 65: 77 Mbps for Streaming & Browsing
• BT Full Fibre 500 – Ultra-Fast Broadband for Your Home
• TalkTalk Full Fibre 150: High-Speed Broadband for Big Homes

Information correct as of 31 July 2026. Prices, tariffs, policy details and providers change frequently, so please check the latest details before making a decision. This article is for general information only and does not constitute financial advice. Free Price Compare is authorised and regulated by the Financial Conduct Authority (FCA).